English to English
1. the act of invading; the act of an army that invades for conquest or plunder
2. any entry into an area not previously occupied
an invasion of tourists|an invasion of locusts
3. (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body
the tumor's invasion of surrounding structures
4. The act of invading; the act of encroaching upon the rights or possessions of another; encroachment; trespass.